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Issue 47, 2015
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PtAu alloy nanoparticles supported on thermally expanded graphene oxide as a catalyst for the selective oxidation of glycerol

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Abstract

Thermally expanded graphene oxide (TEGO) supported PtAu alloy nanoparticles with various compositions was prepared, and then characterized using a combination of atomic absorption spectroscopy, powder X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. These catalysts were evaluated for the aerobic oxidation of glycerol in base-free aqueous solution. The results showed that PtAu(7 : 1)/TEGO exhibited the optimum activity for the conversion of glycerol among all the catalysts. Glycerol conversion of 60.4% and selectivities of 53.5% glyceric acid (GLYA), 25.7% glyceraldehydes (GLYDE), 11.6% dihydroxyacetone (DHA), and 3.8% glycolic acid (GLYCA) were obtained when reacting an aqueous solution of glycerol (0.3 M, 20 mL) at 60 °C under 0.3 MPa O2 for 4 h in the presence of 0.023 g PtAu(7 : 1)/TEGO catalyst. Moreover, the reusability of PtAu(7 : 1)/TEGO was investigated, and a reaction mechanism for the oxidation of glycerol was proposed.

Graphical abstract: PtAu alloy nanoparticles supported on thermally expanded graphene oxide as a catalyst for the selective oxidation of glycerol

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Publication details

The article was received on 07 Mar 2015, accepted on 17 Apr 2015 and first published on 17 Apr 2015


Article type: Paper
DOI: 10.1039/C5RA04048E
RSC Adv., 2015,5, 37112-37118

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    PtAu alloy nanoparticles supported on thermally expanded graphene oxide as a catalyst for the selective oxidation of glycerol

    G. Yang, S. Shao, Y. Ke, C. Liu, H. Ren and W. Dong, RSC Adv., 2015, 5, 37112
    DOI: 10.1039/C5RA04048E

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